The numbering plan indicator (NPI) is a number which is defined in the ITU standard Q.713, paragraph 3.4.2.3.3, indicating the numbering plan of the attached telephone number. NPIs can be found in SCCP and SMS messages. As of 2004, the following numbering plans and their respective numbering plan indicator values have been defined:
| NPI | Description | Standard |
|---|---|---|
| 0 | unknown | |
| 1 | ISDN Telephony | E.164 |
| 2 | generic | |
| 3 | data | X.121 |
| 4 | telex | F69 |
| 5 | maritime mobile | E.210 and E.211 |
| 6 | land mobile | E.212 |
| 7 | ISDN/mobile | E.214 |
Read more about this topic: Telephone Numbering Plan
Famous quotes containing the words numbering and/or plan:
“The task he undertakes
Is numbering sands and drinking oceans dry.”
—William Shakespeare (1564–1616)
“I began revolution with 82 men. If I had [to] do it again, I do it with 10 or 15 and absolute faith. It does not matter how small you are if you have faith and plan of action.”
—Fidel Castro (b. 1926)